Easy to create with TypeScript and Nuxt.js! A guide to implementing an attractive to-do list app that even beginners can do.

When beginners learn programming, the most effective way is to actually create an application, but the first project is always a little intimidating. "Easy to create with TypeScript and Nuxt.js! A guide to implementing an attractive to-do list app that even beginners can do" provides a step-by-step method to eliminate such worries and make app development easy and enjoyable. By utilizing the type safety of TypeScript and the simple framework of Nuxt.js, even beginners can write code that is easy to understand and maintain. In this article, you can learn practical techniques and best practices while implementing the basic functions of a to-do list app, helping you deepen your confidence in programming. Through this guide, you can take your development skills a step further and get a fun programming experience!

The appeal of TypeScript and Nuxt.js

TypeScript and Nuxt.js are very popular technologies in modern web development. They allow you to create more efficient and less error-prone applications. Here are some of the benefits:

Advantages of TypeScript

• Since you can specify types, it is easier to detect program errors in advance.
• Auto-completion makes writing code more efficient.
• It makes it easier to work in teams on large projects.

Features of Nuxt.js

• It is based on Vue.js, so its ease of use is appealing.
• Server-side rendering is easy to perform, making it easy to implement SEO measures.
• It has a wide range of plug-ins and modules, making it highly extensible.

Using TypeScript improves the quality of your code and allows you to create applications quickly with Nuxt.js. For example, when you specify a type in TypeScript, an error will be displayed if you use the wrong type of data. This way, you can find problems at an early stage of development, which reduces the need to fix them later. Nuxt.js makes it easy to configure your project and create pages.

npm install -g create-nuxt-app

This command makes it easy to create a Nuxt.js project. Combining TypeScript and Nuxt.js allows for some very powerful applications.

The Need for a ToDo List App

A to-do list app is a very useful tool for managing your daily tasks. By using this app, you can organize your tasks efficiently and get a sense of accomplishment. Here, we will talk about the necessity of a to-do list app.

The Importance of Task Management

• You can record tasks that are easy to forget.
• Prioritizing allows you to tackle what is important first.
• Checking the tasks you have completed will increase your motivation.

Benefits of To-Do Lists

• You can easily add or remove tasks.
• You can visually check the progress of tasks.
• The simple design makes it easy for anyone to use.

Specifically, when you wake up in the morning, you think, "What am I going to do today?" If you have a to-do list at that time, you can immediately remember the tasks. Also, by checking off each task as you complete it, you can feel a sense of accomplishment. For example, by writing down tasks in your daily life, such as school homework or shopping lists, you can act more efficiently.

Environment setup for TypeScript and Nuxt.js

To develop an app using TypeScript and Nuxt.js, you must first prepare your environment. Below, we will explain the steps to set up your environment in detail.

Preparing your development environment

• Install Node.js.
• Enables you to use command line tools.
• Choose an editor (e.g. Visual Studio Code).

Node.js is a JavaScript execution environment, and we use it to run Nuxt.js. You can install Node.js by downloading it from the official website. Once the installation is complete, you can check it from the command line as follows:

node -v

This will verify that Node.js is installed correctly.

Installing TypeScript and Nuxt.js

• Create a project folder and navigate to it.
• Install Nuxt.js.

The commands to do this are:mkdir my-todo-app cd my-todo-app npx create-nuxt-app .

When you run this command, you will be asked a few questions. If you select TypeScript, a Nuxt.js project will be created with TypeScript ready. Now your TypeScript and Nuxt.js environment is ready.

Steps to create a ToDo list app

Now that the environment is ready, let's actually create a ToDo list app. Here, we will explain the steps to implement basic functions.

Project Configuration

• Organize your folders and files.
• Create the necessary components.

First, consider the structure of your project. We recommend the following folder structure:my-todo-app/ ├── components/ │ ├── TodoForm.vue │ └── TodoList.vue └── pages/ └── index.vue

Implementing basic functionality

• Create a function to add a task.
• Create a function to display tasks.

Here,TodoForm.vueImplement the functionality to add a task using the component. Here is the code:

addition

This component creates a form for adding a task that the user can fill out. When a task is added, an event is sent to the parent component, which adds the new task.

Styling Tips

• Use CSS to adjust the appearance.
• Make the design user-friendly.

Finally, we'll use CSS to style the app. Here's an example of some simple styling:

form { display: flex; justify-content: space-between; margin-bottom: 20px; } input { flex: 1; padding: 10px; } button { padding: 10px;

By improving the appearance in this way, the app becomes easier to use.

React is very popular, but state management can be complicated. For example, it is common to use libraries such as Redux to manage state in React. On the other hand, Vue (including Nuxt.js) makes state management easier, and state management can be done smoothly by using the official library called Vuex.

How to deploy the app

Once you have developed an app, the next step is to deploy it to make it available on the Internet. Deploying means uploading the developed application to a server and making it accessible to anyone. Below, we will explain how to deploy a to-do list app created with TypeScript and Nuxt.js.

Prepare to deploy

• Verify that the application works correctly.
• Prepare the necessary configuration files (e.g.nuxt.config.jssettings).

First, before deploying, make sure your application works properly locally. This includes checking that all functions are working as expected and that there are no errors. Also,nuxt.config.jsReview the file settings and add environment variables, etc., if necessary.

Building a static site

• Nuxt.js allows you to build your application as a static HTML file, which makes it easy to deploy.

Next, build the application. Run the following command to generate the static files:npm run generate

When you run this command,distThis will generate static files in the folder that you can upload to your server to publish your app.

Choosing a hosting service

• There are a variety of hosting services available, such as Netlify, Vercel, and GitHub Pages, that are easy to deploy and offer free plans.

For example, if you use Netlify, you can deploy it using the following steps:

1. Create a Netlify account.
2. distUpload the folder by dragging and dropping it.
3. An HTTPS URL will be automatically generated.

In addition, with Vercel, you can also link it to a GitHub repository and have it automatically deployed every time you push code.

Added features to the ToDo list app

Once you have a basic to-do list app, the next step is to add features to make it even more useful. Below, we will explain some ideas for adding features and how to implement them.

Task editing function

• Adds the ability to edit tasks that have already been added.

To select a task so you can edit it,TodoList.vueImplement editing functionality in the component. Below is the example code for editing functionality.

<template> <div> <ul> <li v-for="(todo, index) in todos" :key="index"> <span v-if="!todo.isEditing">{{ todo.text }}</span> <input v-if="todo.isEditing" v-model="todo.text" /> <button @click="editTodo(index)">{{ todo.isEditing ? &#039;Saving&#039; : &#039;Editing&#039; }}</button> <button @click="deleteTodo(index)">delete</button> </li> </ul> </div> </template> <script lang="ts"> export default { props: ['todos'], methods: { editTodo(index) { this.todos[index].isEditing = !this.todos[index].isEditing; }, deleteTodo(index) { this.todos.splice(index, 1); } } }; </script>

With this code, you can click on a task to switch to edit mode, and click on it again to save it.

Task Completion Feature

• Add a checkbox to indicate when a task is completed.

It's also a good idea to add a checkbox to visually indicate when the task is completed. Below is example code for that.<template> <div> <ul> <li v-for="(todo, index) in todos" :key="index"> <input type="checkbox" v-model="todo.completed" /> <span :class="{ completed: todo.completed }">{{ todo.text }}</span> <button @click="deleteTodo(index)">delete</button> </li> </ul> </div> </template> <style> .completed { text-decoration: line-through; } </style>

This makes it easy to visually mark off completed tasks.

User Data Storage

In a to-do list app, it is very important to persistently store tasks added by the user. Below we will explain how to store user data.

Using local storage

• Use your browser's local storage to save tasks.

Using local storage, you can save the user's tasks in the browser and the data will persist even if the page is reloaded. Below is an example of code that uses local storage to save.

methods: { saveTodos() { localStorage.setItem('todos', JSON.stringify(this.todos)); }, loadTodos() { const todos = localStorage.getItem('todos'); if (todos) { this.todos = JSON.parse(todos); } } }

In this way,saveTodosSave the task using the method,loadTodosBy loading data in a method, you can make the task persistent. It will be automatically updated when the app is loaded.loadTodosIf you call a method, the task will persist even if you reload the page.

Save data to the server

• For more serious apps, you might want to store the data on a server.

For example, you can use Firebase or Express.js to build a server and store data through an API, allowing you to access the same data from multiple devices.

Improved usability

Improving usability is important to make the app easier to use. Below, we will explain some of the improvements.

Add feedback

• Providing feedback to users on their actions improves comprehension.

For example, when you add a task, you might want to display a message like "Task added."alertor, more elegantly, you can use a toast notification.

Responsive Design

• We aim to create a design that is easy to use on smartphones and tablets.

You can use CSS media queries to create layouts that respond to different screen sizes. For example, you can change the style for devices with a screen width of 768px or less by writing the following:@media (max-width: 768px) { form { flex-direction: column; } }

This makes the app easy to use on a smartphone.

The Importance of Testing

Once you have developed your app, it is important to test it first, as testing can help you find bugs early and improve quality. Below we will explain the importance of testing and how to do it.

Test Objective

• Finding and fixing bugs.
• Check the impact on existing features when adding new features.

Testing is a crucial process to ensure that your application works as expected, especially when you add new functionality to ensure that functionality that previously worked doesn't break.

Implementing unit tests

• Use tools like Jest or Vue Test Utils to test each component.

Below is a simple example of a unit test. I will use Jest this time.

Implementing unit tests

Unit testing is an important process to check whether each component or function of your application works as expected. Especially when you are using TypeScript or Nuxt.js, you can test efficiently by using Jest or Vue Test Utils.

Setting up Jest

First, add Jest to your project. Install it using the following command:

npm install --save-dev jest @vue/test-utils ts-jest @types/jest

next,jest.config.jsCreate it at the root of your project and add the following configuration:module.exports = { preset: 'ts-jest', testEnvironment: 'jsdom', moduleFileExtensions: ['js', 'ts', 'vue'], transform: { '^.+\\.vue$': 'vue-jest', '^.+\\.ts$': 'ts-jest', }, collectCoverage: true, coverageReporters: ['html', 'text-summary'], };

This setting will allow TypeScript and Vue files to be processed correctly.

Component Test Example

Next, we'll write unit tests for the components of our to-do list app. For example, let's test the add task functionality.

TodoList.vueWrite a test for your component like this:

import { shallowMount } from '@vue/test-utils'; import TodoList from '@/components/TodoList.vue'; describe('TodoList.vue', () => { it('Verify that a task is added', async () => { const wrapper = shallowMount(TodoList); const input = wrapper.find('input'); const button = wrapper.find('button'); await input.setValue('New task'); await button.trigger('click'); expect(wrapper.vm.todos).toHaveLength(1); expect(wrapper.vm.todos[0].text).toBe('New task'); }); });

In this test, when adding a task, we set values in the input fields and check that the task is added by clicking the button.expectUsingtodosArray length and contents can be verified to ensure functionality works correctly.

Running the tests

To run the test, use the following command:

npm run test

If a test is successful, a success message is displayed in the console, and if it fails, an error message is displayed, allowing you to quickly see which test failed.

Introducing CI/CD

As your project grows, it's important to consider adopting continuous integration (CI) and continuous delivery (CD), which allows you to create a process whereby code changes are automatically tested and deployed to production.

Configuring GitHub Actions

You can use GitHub Actions to build a CI/CD pipeline. Below is an example of a basic GitHub Actions configuration file.

.github/workflows/ci.ymlCreate a file called and add the following content:

name: CI on: push: branches: - main jobs: build: runs-on: ubuntu-latest steps: - name: Checkout code uses: actions/checkout@v2 - name: Set up Node.js uses: actions/setup-node@v2 with: node-version: '14' - name: Install dependencies run: npm install - name: Run tests run: npm run test

In this configuration,mainEvery time a push is made to a branch, it checks out the code from the repository, sets up Node.js, installs dependencies, and runs the tests.

Automating deployment

You can also add a step to automatically deploy your app after the tests are successful. Netlify and Vercel provide GitHub Actions for deployment, so you can use them to automatically deploy your app after the tests are successful.

Below is an example configuration for automating deployment to Netlify.

- name: Deploy to Netlify uses: nwtgck/actions-netlify@v1.1.0 with: publish-dir: ./dist production-deploy: true github-token: ${{ secrets.GITHUB_TOKEN }} netlify-auth-token: ${{ secrets.NETLIFY_AUTH_TOKEN }} netlify-site-id: ${{ secrets.NETLIFY_SITE_ID }}

By adding this step, we will automatically deploy to Netlify only if the tests are successful.

summary

Through the process of developing and deploying a to-do list app using TypeScript and Nuxt.js, I learned the following points:

1. Build the app: We wrote type-safe code using TypeScript and built a Single Page Application using Nuxt.js.
2. Deploy: Built as static files and easily deployed using Netlify or Vercel.
3. Additional Functions: To improve usability, we've added the ability to edit and complete tasks.
4. The Importance of Testing: Maintained the quality of the application using unit tests.
5. Introducing CI/CD: We used GitHub Actions to achieve continuous integration and delivery.

With this knowledge, we can continue to add and improve functions to make our applications easier for users to use. It is important to continue learning about the latest technologies and best practices.